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A013509 sinh(sec(x)-sech(x))=2/2!*x^2+242/6!*x^6+438722/10!*x^10... 0
2, 242, 438722, 3496736882, 79119810366722, 4053422315328489842, 407438035244753039317442, 72690404080321962122585230322, 21370388298881285712954829034618882, 9777171935777119106864269918684468443122, 6652045047862303555990692726103475288071112642 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..10.

CROSSREFS

Sequence in context: A146312 A109930 A309037 * A013472 A013505 A013478

Adjacent sequences:  A013506 A013507 A013508 * A013510 A013511 A013512

KEYWORD

nonn

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

More terms from N. J. A. Sloane, Dec 17 2011

STATUS

approved

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Last modified September 18 13:54 EDT 2021. Contains 347527 sequences. (Running on oeis4.)